A hand-built call will almost always sound better. The maker will hand-tune every call, and if a call doesn't perform it will go into the scrap box. Mass produced calls can't possibly have the attention to quality control that a hand-made call gets.
Remember that in consumer manufacturing, there are several steps to market, and each step produces a profit from manufacturer to packaging to wholesaler to retailer. But in packaging, wholesale, distribution and retail, the call itself gets no attention at all. So the original cost of a mass-produced call is pretty low at the beginning of the steps, but what the market will bear at the end, the retailer, making a profit for everyone between.
Since a custom call maker is in charge of everything from material selection through every manufacturing step, he has a lot more time into each call and more control throughout the manufacturing process. There isn't much cost in the materials of a call, but a lot in the time invested. So, a custom call will sound better, cost more, and live up to the reputation of its maker.
When [url="http://www.EverydayHunter.com"]"The Everyday Hunter"[/url] isn't hunting, he's thinking about hunting, talking about hunting, dreaming about hunting, writing about hunting, or wishing he were hunting.